It was five years ago this week, the explosive headlines surrounding bernie madoff. And this week, some of his alleged cronies are on trial, now years after investors first learned of that giant scheme. Tonight, an interview with madoff, getting attention all over again, after placing some of the blame on his trusting clients themselves. Abc's susan saulny tonight. Reporter: At the federal prison in north carolina where bernard madoff is serving a 150-year sentence, fellow inmates want him to teach an investment class. But he said the prison won't allow it. In a recent interview with "the wall street journal," madoff shared new insight about the massive ponzi scheme he master minded. On wednesday, it will be five years since his arrest. His victims, he said, have themselves to blame. "My investors were sophisticated people, smart enough to know what was going on and how money was made. But they still invested with me without any explanations." This comes as five of madoff's ex-employees are facing trial on charges that they knew about the scheme and profited from it. He said he felt remorseful, but he didn't spend a lot of time gemi dwelling on the impact of the actual -- the actual ponzi scheme. Reporter: Madoff describes being cut off by miss immediate family, who won't talk to him, and said loneliness is the worse consequence of his conviction. Susan saulny, abc news, washington.

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